It's not ":confused", it's ":confused:" .  IOW, you need to add a colon (":") at the end.
Or, just click on the smiley you want in the box to the left of the "Your Reply:" field.  It adds the smiley to the end of the message, but you can always cut paste.  :)  :(  :o  :D  ;)  :p  :cool...